When initializing a new repository, set where the
image source directories will be stored. This may be
set when you are working with an existing git
repository which you would like to unobtrusively add
subuser image sources too.

--permissions-file=PERMISSIONSFILE

When adding a new image source, the path to the new
permissions.json file for the image source. Note: This
flag should not be used to import permissions files
from outside of the repository. Use the POSIX cp
command for that.

--image-file=IMAGEFILE

When adding a new image source, the path to the new
image file which will be used to build the image
source. Note: This flag should not be used to import
build files from outside of the repository. Use the
POSIX cp command for that.

--build-context=BUILDCONTEXT

When adding a new image source, the path to the build
context for building the image.